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I think the difference isn't so much height gained, but back calculating
to horsepower based on a 1 "G" acceleration at the start of the launch. I've flown off a Supacat and while it had good acceleration, it sure didn't match up to the whopper of a winch that was built by the permian soaring association. Talk about a zippy launch! http://members.cox.net/tsample10/SpecialProjects.html By the way, I think this "unified winch design" concept is a really great move. If you have a diesel driving through a fluid flywheel you don't need that much power: we have a Supacat with a 245 hp Deutz V8 aircooled industrial diesel and torque converter (no gearbox). This can launch an ASH-25 or just about any Nimbus. With a 15 m glider, K-21 or Grob you'd expect 1200-1400 ft on a 1000m run in calm conditions and over 2000 ft if its blowing a bit. I'd agree with everything you've said about the specialised nature of a glider winch, the heavy duty engineering and the costs. -- martin@ : Martin Gregorie gregorie : Harlow, UK demon : co : Zappa fan & glider pilot uk : |
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